[cleanup][doc] Fix changelog

Fix location of changelog entry.

CHANGELOG.md

@@ -8,8 +8,6 @@ SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
 ## Dependencies
 In order to build the DUNE core modules you need at least the following software:
 
-- The construction of `FiedlMatrix` and `FieldVector` from `std::initializer_list`
-  is now `constexpr`.
 - C++ compilers LLVM Clang >= 10 or GCC g++ >= 9
 - CMake >= 3.16
 - Optional: pkg-config to find other optional dependencies
@@ -17,6 +15,9 @@ In order to build the DUNE core modules you need at least the following software
 
 ## Changelog
 
+- The construction of `FiedlMatrix` and `FieldVector` from `std::initializer_list`
+  is now `constexpr`.
+
 - Python: Add a dump/load functions to dune.common.pickle which add support
   for storing and recreating the JIT generated modules required for the
   pickling of dune objects to work. In addition a class for writing time